File content as of revision 1:a8b9fb95696b:

#include <mbed.h>
//#include "IRremote.h"
#include "PCF8583_rtc.h"

void NixieDisplay(void);

DigitalOut Red(P0_7);
DigitalOut Green(P0_17);
DigitalOut Blue(P0_16);

I2C i2c(P0_10, P0_11);       // sda, scl
PCF8583rtc rtc(&i2c, PCF8583_addr);
//IRremote rc5(P0_0);

// i2c addresses
const int ADDR_8574_1 = 0x70;
const int ADDR_8574_2 = 0x72;

int    alarm    = OFF;
int    setTimer = OFF;

int main()
{
    struct DateTime_t dtw;
    struct DateTime_t dtr;
    char   hours;
    char   mins;
    char   tmp[8] = {1, 2, 3, 4, 5, 6, 7, 8};
    char   tmp1[8];
    
    Red = Green = Blue = 1;

    i2c.frequency(400000);
    
    dtw = rtc.read(TIME);
    dtw.time.hours = rtc.bin2bcd(6);
    dtw.time.minutes = rtc.bin2bcd(38);
    rtc.write(TIME, dtw);

    while(1) {
        for(int x = 0; x < 7; x++) {
            tmp[x] = rtc.bin2bcd(rand());
        }
        rtc.WriteNVram(USER_REG, tmp, 8);
        wait(1);
        rtc.ReadNVram(USER_REG, tmp1, 8);
      
        for(int x = 0; x < 7; x++) {
            Blue = !Blue;
            if(tmp[x] != tmp1[x]) {
                i2c.write(ADDR_8574_1, tmp, 1);
                tmp1[0] = 0;
                i2c.write(ADDR_8574_2, tmp1, 1);
            }
        }
    }
    
/*
    while(1) {
        dtr = rtc.read(TIME);
        i2c.write(ADDR_8574_1, &dtr.time.hours, 1);
        i2c.write(ADDR_8574_2, &dtr.time.minutes, 1);
       
        if (rc5.readclear(0) != 0xff) {
            if(rc5.read(2) != 0xff && rc5.read(3) != 0xff) {
                hours = (dtr.time.hours & 0xf0) + (dtr.time.hours & 0x0f);
                mins  = (dtr.time.minutes & 0xf0) + (dtr.time.minutes & 0x0f);
            
                switch(rc5.read(2)) {
                case 0x47:  //Up
                            hours++;
                            dtr.time.hours = rtc.bin2bcd(hours);
                            break; 
                case 0x48:  //Down
                            hours--;
                            dtr.time.hours = rtc.bin2bcd(hours);
                            break; 
                case 0x59:  //Left
                            mins++;
                            dtr.time.minutes = rtc.bin2bcd(mins);
                            break; 
                case 0x5a:  //Right
                            mins--;
                            dtr.time.minutes = rtc.bin2bcd(mins);
                            break; 
                }

                rtc.write(TIME, dtr);      //Set the current date and time
                rc5.clear();
            }
        }
        
        wait(.5);
    }
*/
}